The book is dedicated to the island of Guernsey, where Victor Hugo spent 15 years in exile. Hugo uses the setting of a small island community to convert seemingly mundane events into drama of the highest caliber. Set just after the Napoleonic Wars, Toilers of the Sea deals with the impact of the Industrial Revolution upon the island. The story concerns a Guernseyman named Gilliatt, a social outcast who falls in love with Deruchette, the niece of a local shipowner, Mess Lethierry. When Lethierry's ship is wrecked on a perilous reef, Deruchette promises to marry whoever can salvage the ship's steam engine...